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Underground Stormwater Detention and Infiltration 

Our underground systems offer you flexibility and customization for either detention or infiltration applications – metal, concrete, and plastic systems are available.

Belowgrade Detention IconDetention systems are employed on a site to reduce the quantity of stormwater runoff leaving a site by temporarily storing the runoff that exceeds a site’s allowable discharge rate, and releasing it slowly over time.


Underground Infiltration SystemInfiltration systems are incorporated to reduce the volume of stormwater runoff being discharged from a site. This runoff reduction strategy is a major part of a low impact development design.

Detention / Infiltration Systems

CMP Detention and Infiltration System

Corrugated Metal Pipe (CMP)
Versatile, flexible, cost-effective, CMP is an ideal choice for detention and infiltration.

CMP Detention - University Blvd Dallas TX


Open-bottom polyethylene chambers economically infiltrate runoff and optmize storage on shallow sites.

ChamberMaxx - Indiana Hospital

DuroMaxx SRPE Detention System

Steel-reinforeced polyethylene pipe has multiple joint types available, including watertight to fit your project requirements.  

DuroMaxx Detention Puyallup WA

CON/SPAN Concrete Arch Detention System

Precast concrete system with a wide range of span and rise combinations available.

CONSPAN Detention

Terre Arch
Modular, multi-chambered, precast concrete stormwater storage systems.

 Terre Arch


Flow Control Products

Vortechs Flow Control Valves

Vortex Valves

Control the discharge flow rate from drainage,
storage attenuation and infiltration systems

StormGate Flow Control

StormGate Flow Control

Reduce high energy flow of runoff prior
to water quality treatment system

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Resource Links

  Detention and Infiltration Solutions Guide

  Stormwater Product Line Card

  LID Application Guide

Click for details Contech detention/infiltration systems can be easily modeled with the HydroCAD Stormwater Modeling System.
Click here for more details.